Despite all of the shifting, there has been almost no fundamental change in college football. In 2005 (prior to the Miami, Vtech, BC jump to the ACC) there were 63 football programs in the 6 BCS conferences.

Now? There are 64 football programs in 5 conferences. The only changes in composition are Utah, TCU, and Louisville joining the big boys, and Temple and Connecticut being left behind (and even in that case Connecticut had just added FBS football, and Temple was on the verge of getting demoted).

Basically, the Big East was swallowed up by the other leagues, and a few other teams shifted allegiances (mostly to the benefit of the SEC and the B1G)